Governing means for marine turbines



c. R. wALLER;

GOVERNING MEANS FOR MARINE TURBINES.

FILED SEPT-4.1919.

APPLICATION Patented Feb. 28, 1922."

2 SHEETS-SHEET l.

C. R. WALLER.

GOVERNING MEANS FOR MARINE TURBINES- APPLICATION FILED SEPT-4, 1919.

1,408,049, Patented Feb. 2g,. 2

2 SHEETS-SHEET 2.

4. [III/III" I I liil! JIM/WE).

UNITED STATES PATENT OFFICE.

CARL R. WALLER, OF TREN'ION, NEW JERSEY,-ASSIGNOR TO DE LAVAL STEAMTURBINE. COMPANY, OF TRENTON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

Specification of Letters Patent.

' GOVERNING MEANS FOR MARINE TURBINES. a

Patented Feb. 28, 1 922.

Applicationfiled September 4, 1919. Serial No. 321,721.

To all whom it may concern:

Be it known that I, CARL R. vvALLER, acitizen of the United States,residing at Trenton, county of Mercer and State of New Jersey, haveinvented a new and useful Improvement in Governing Means for MarineTurbines, of which the following is a full,

important when the vessel .is operating in a high sea, which may'causethe propeller'to eave the water, thus. suddenly changing the 1 load onthe drivingjturbine.

Itis also essential that this governing arrangement shall be installedin such "a man her that any steam that is used for drivingthe'propelling turbine must go through the governor-controlled valve.Vlqiere' compound turbines are used, several auxiliary pipes areprovided, inorder' to make it possible to operate one ofthe turbines,should the other onefor some reason fail. In such cases,xit is desirablethat any steam used for drivin any one of. the turbinesshall go througithis governor valve, and that in case of any increase of speed of eitherturbine shaft, the valve shall be actuated.

In connection with geared turbines, it is of the utmost importance thatthe oiling system should always be in commission, and 1t 1s thereforedesirable to have some arrangement that w'ill shut down the turbine incase the oiling system should fail.

My invention has for its object to control in the event of abnormalspeed of th'e'turbin'e or upon failure of the oil supply. The ventioncomprises a steam supply valve arranged to be opened by a predeterminedpressure of 0 1l,such pressure being reducible below said predeterminedamount by means for restricting theiflow of oil operable bythe overnorin case of excess turbine speed. y thisarrangement, whether the pressureof oil be reduced by its own failure or by a restricted flow dueto'excessive speed ftheturbin he upp y, of s m to he the ves turbinewill be out off until the abnormal 2 condition is removed.

Fig. 1 is a plan view of a compound turbine, showing the manner ofapplicationof my invention. Fig. 2 is an elevation of the same. V

I Fig. 3 is a vertical sectional view of a preferred embodiment of myinvention combined with a governor of known type.

No details of the invention, except, certain pipe connections, are shownin'Figstl and 2,

which represent a conventional illustration of a compoundturbine. Theadmission of steam tothe high pressure turbine (land to the low'pressure turbine b is controlled the main governor-controlled valve 0in. the

valve casing 0,1the inlet for steam being through the pipe at.

. Both the high pressure turbine andthe low pressure turbine are, ofcourse, normally operated, but if, for any reason, it becomes desirableor necessary to cut out the high pressure. machine, the low pressuremachine can be run independently by closing the manoe'uvering, valve eand v openingthe valves '7 and g, which admit steam respectively to theahead and astern portions of the low pressure machine.

It will belobserved that, whether one or both turbines are in operation,the a dmis sion of steam regulated by the governorc'ontrolled valve'o,

. Both turbine shafts are' equipped with 'governorsh, each 'of whichcontrols an oil admlsslon pllot valve i connected, through an oil pipe jwith a piston controlling the main'valve, as hereinafter described.

One of the governors h is. shown in Fig. 3. The turbine shaft is isgeared to an upright shaft at having a housing n within which arecentrifugally operable weights 0 held in neutral position by springs 39.the governor valve so that it will close either I When the governorrevolves at sufiicient speed to throw out the weights, they,

but my invention contemplates the employment of any workable governor.

The main valve casing o'has the steam, 1 inlet 0?, and one or more steamoutlets, The

number of outlets willof course depend upon the particular arrangementon board I sel, two "being shown in the present disclosure.

The valve casing c is bolted to a'support- 111gfranre 15.

down through a stufiinq bog; w into a cylinder formed by the lower partof the supporting frame It.

cylinder '0. Threaded on. the valve spindle u is an adjusting nut gbet'ivee'n which and a fixed part of the frame If, and coiled about thespindle; is a spring p The valve '0, unless actuated by sufiicientpressure of oil against? piston 13, as he1'ein-after described, isheld'closed, as showirin Fig. 3, by the tension of spring 2. a Y

The governor-actuated sleeve 8 has pins 10, which engage" the forked endof an intermediately fulcriune'd lever 11, Whose other end 'is'attachedto the st'em of the' pilot valve 2', liereinbefore ,InentiOne'dQ p Oilfrom; the main coiling system is admitted to the pilot valve casing at12; p The oiloutflo'yv's from the pilot valve casing if for any re tooverconief the tension of the spring 2. Let it be assuin d tli ffi thenormal pressure in the main oiling systemi'smaintained at about tenpoundsand' that it" isdesirable to shut 01f steam froin the turbine incase the oil pressure should drp to fivepoints or below. It is clearthat to start the turbine the oilings'ysten'i must first be put intoservice. Specifically, oil is admitted to the I pilot velvet and floiv'stheretliroujgh unrestric'tedl'y, passing through pipej into cylinder aIt is also necessarvto create a pressure on th e oiling system-lot abmefive pounds beforepiston13 lifts and opens valve 0. Inotlier Words;stearn cannot be adniitted through the valve 0 unless the r ssu e in theoiling systernis above five Shoultljtlie turbine'uiiit 111; Service andI asofi the oiling systenrsliould ila h re F v, up t d p of il iii sureto five pounds, vvould immediately start to close. Q] a a case, diiringservice, the turbine speed eii'cieedsnor'rnalg thi governor It willactuate .mdj fj the oil" rssag' as an I v M cause a drop 11,1 oilpressure to fiv peafids,

The steam-admission valve 1; 1s in'oi'lnt'e'd ona spindle a, whichefitends On the lower end'otl the x 'alx c' spindle a is apiston 13within the COPY or less, whereupon the valve 0) will close. As'soonasthe turbine speed reduced to normal, the pilot valve will be operated toallow free flow ofoil and ca'us'ethe" oil pressure to Inount above fivepounds and thus actuate the piston 13 to open the valve 1;.

Having now fully described my invention, \vhatI claim and desire toprotect by Lettars Patent 1. In a governing rneans for stearn turbines,the cornb i nationivith a turbine unit, of a governor o'p erablethereby,a steam admission valve, a lubricatingioil circulating system for theturbine unit,. including a contantly open throttl ing passage causing apredetermined rate of'flow froin onepart of thesysteln to anothjeigmeanscontrolled by the governor tovary the rate offlow tothe first mentioned,part oi" sai d s y'stenl, thereby varying the pressure of oil] at oneside of said throttlingpassage, anda Inovable element connected with andcontrolling the opening; and closinglf of the I ste'aInI valve andcontain nits o e'mti n b 1 said var ation in pressure of oil at one sisari-11 throtfling s a a 1; 2. na governing" means'fo'r ste'zinrturbine's; the combination. withfa turbine unit,

of a governor operable a Steam mission valve, a. lubricatingvoilcirculating system for the turbine unit, fa; 61astantly' openthrottlingjpa'ssage a predetermined rateoffloiv frorn one art ofthe'system to mothers-means contr'o l'edbythe governor toiv'a'rythe'rate of flovv to the first 1nentugned partof said system, therebyvarying the pressure of" oil atone side? of said throttling "passage; .acylinder continunic'ating with the part of thes'ystem Which the rate ofoil variedias specified, and api teninsaiacyimder connected with andcontrolling "the operation f fi Steain valve.

3. In a governing'nieans far-"steam turbihe's the combination with a'tlirbine unit,

of a governor operable thereby. a stem; ad-

niission valve, a lubricatingbil circulating for the, turbine unit,including" a constantly openthrottling passage causing a eaterminea rateof new from onepait of.

tli'e sys'teni to another, means controlled by the governor tovary therate offl'oivto' the first mentioned part of'said systein, therebyvarying the pressure of'o'il at one side ofsaid throttling passage, acylindervoo nnhunicating \vlth the system between the throttl ng passageanduie governor @o'ntmueai means,

and afpisto'nl in saidfcylinder conneaed" to theiste'ani valve foractuatin'gfsaid valve;

41 In'Ka guv'eming mfean's forsteam turtimes, are combination with al'amiss-"aria;

of 1 overns: operable thereby, a steam admission valve; a lubricating?oil circulating 'Y' fi ie the" i l i i i i l l reat-amass raiser aae'psre 6m the system to another, means controlled by the governor to varythe rate of flow to the first mentioned part of said system, therebyvarying the pressure of oil at one side of said throttling passage, acylinder interposed in said system, a piston in said cylinder, saidthrottling passage connecting the ends of the cylinder on opposite sidesof said piston, whereby the piston is subjected to said variablepressure of theoil, and means connecting the piston and steam valvewhereby the opening and closing of the latter is controlled by saidpiston.

5. The combination ofasteam turbine and a pressure lubricating systemtherefor, a valve for controlling the admission of steam to saidturbine, a valve actuating device wholly under the control of thepressure in the lubricatings steni,n1eans for permitting a constant flow0 oil through the lubricating system at a predetermined rate to build uppressure to actuate said valve, a governor actuated by the turbine, anda valve controlled by the governor for varying the feed of oil to thesystem to vary the pressure.

0'. In a governing means 101' steam turbines, the combination with aturbine unit, of a steam admission valve, a lubricating oil circulatingsystem for the turbine unit, including a constantly open passage causinga predetermined rate of flow from one part of the system to another, anda movable element connected with and controlling the opening and closingof the steam valve and controlled in its operation by said variation inpressure of oil at one side of the throttling passage, whereby failureto maintain an adequate flow of oil through the system at the last namedside of the throttling passage will cause the steam valve to be movedtoward its closed position.

In testimony of which invention, I have hereunto set my hand, atTrenton, N. J on this 22nd day of August, 1919.

CARL R. WALLER.

